diff --git a/crates/modules/rules-engine/src/ruleset.rs b/crates/modules/rules-engine/src/ruleset.rs
index 5ee1e3ae..bc34bd32 100644
--- a/crates/modules/rules-engine/src/ruleset.rs
+++ b/crates/modules/rules-engine/src/ruleset.rs
@@ -45,7 +45,13 @@ impl<T: Validatron> Ruleset<T> {
     }
 
     /// Perform the check on an instance of a type `T` and returns an iterator over the matching rules.
-    pub fn matches<'a>(&'a self, e: &'a T) -> impl Iterator<Item = &CompiledRuleWithMetadata<T>> {
+    pub fn matches<'a, 'b>(
+        &'a self,
+        e: &'b T,
+    ) -> impl Iterator<Item = &'b CompiledRuleWithMetadata<T>>
+    where
+        'a: 'b,
+    {
         self.rules.iter().filter(|r| r.rule.is_match(e))
     }
 }
diff --git a/crates/validatron/examples/ruleset.rs b/crates/validatron/examples/ruleset.rs
index 9e8d3512..dbe5aeb8 100644
--- a/crates/validatron/examples/ruleset.rs
+++ b/crates/validatron/examples/ruleset.rs
@@ -33,7 +33,10 @@ impl<T: Validatron> Ruleset<T> {
     }
 
     /// Perform the check on an instance of a type `T` and returns an iterator over the matching rules.
-    pub fn matches<'a>(&'a self, e: &'a T) -> impl Iterator<Item = &CompiledRule<T>> {
+    pub fn matches<'a, 'b>(&'a self, e: &'b T) -> impl Iterator<Item = &'b CompiledRule<T>>
+    where
+        'a: 'b,
+    {
         self.rules.iter().filter(|rule| rule.is_match(e))
     }
 }
diff --git a/crates/validatron/src/validator.rs b/crates/validatron/src/validator.rs
index f6ccb49a..a5f03f33 100644
--- a/crates/validatron/src/validator.rs
+++ b/crates/validatron/src/validator.rs
@@ -25,7 +25,7 @@ enum Leaf<'a> {
     Owned(Box<dyn Any>), // methods need a relaxed leaf type
 }
 
-impl<'a> Deref for Leaf<'a> {
+impl Deref for Leaf<'_> {
     type Target = dyn Any;
 
     fn deref(&self) -> &Self::Target {